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-rw-r--r--src/rocksdb/logging/env_logger_test.cc162
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diff --git a/src/rocksdb/logging/env_logger_test.cc b/src/rocksdb/logging/env_logger_test.cc
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+++ b/src/rocksdb/logging/env_logger_test.cc
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+// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
+// This source code is licensed under both the GPLv2 (found in the
+// COPYING file in the root directory) and Apache 2.0 License
+// (found in the LICENSE.Apache file in the root directory).
+//
+
+#include "logging/env_logger.h"
+#include "env/mock_env.h"
+#include "test_util/testharness.h"
+#include "test_util/testutil.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+namespace {
+// In this test we only want to Log some simple log message with
+// no format.
+void LogMessage(std::shared_ptr<Logger> logger, const std::string& message) {
+ Log(logger, "%s", message.c_str());
+}
+
+// Helper method to write the message num_times in the given logger.
+void WriteLogs(std::shared_ptr<Logger> logger, const std::string& message,
+ int num_times) {
+ for (int ii = 0; ii < num_times; ++ii) {
+ LogMessage(logger, message);
+ }
+}
+
+} // namespace
+
+class EnvLoggerTest : public testing::Test {
+ public:
+ Env* env_;
+
+ EnvLoggerTest() : env_(Env::Default()) {}
+
+ ~EnvLoggerTest() = default;
+
+ std::shared_ptr<Logger> CreateLogger() {
+ std::shared_ptr<Logger> result;
+ assert(NewEnvLogger(kLogFile, env_, &result).ok());
+ assert(result);
+ result->SetInfoLogLevel(InfoLogLevel::INFO_LEVEL);
+ return result;
+ }
+
+ void DeleteLogFile() { ASSERT_OK(env_->DeleteFile(kLogFile)); }
+
+ static const std::string kSampleMessage;
+ static const std::string kTestDir;
+ static const std::string kLogFile;
+};
+
+const std::string EnvLoggerTest::kSampleMessage =
+ "this is the message to be written to the log file!!";
+const std::string EnvLoggerTest::kLogFile = test::PerThreadDBPath("log_file");
+
+TEST_F(EnvLoggerTest, EmptyLogFile) {
+ auto logger = CreateLogger();
+ ASSERT_EQ(logger->Close(), Status::OK());
+
+ // Check the size of the log file.
+ uint64_t file_size;
+ ASSERT_EQ(env_->GetFileSize(kLogFile, &file_size), Status::OK());
+ ASSERT_EQ(file_size, 0);
+ DeleteLogFile();
+}
+
+TEST_F(EnvLoggerTest, LogMultipleLines) {
+ auto logger = CreateLogger();
+
+ // Write multiple lines.
+ const int kNumIter = 10;
+ WriteLogs(logger, kSampleMessage, kNumIter);
+
+ // Flush the logs.
+ logger->Flush();
+ ASSERT_EQ(logger->Close(), Status::OK());
+
+ // Validate whether the log file has 'kNumIter' number of lines.
+ ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
+ DeleteLogFile();
+}
+
+TEST_F(EnvLoggerTest, Overwrite) {
+ {
+ auto logger = CreateLogger();
+
+ // Write multiple lines.
+ const int kNumIter = 10;
+ WriteLogs(logger, kSampleMessage, kNumIter);
+
+ ASSERT_EQ(logger->Close(), Status::OK());
+
+ // Validate whether the log file has 'kNumIter' number of lines.
+ ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
+ }
+
+ // Now reopen the file again.
+ {
+ auto logger = CreateLogger();
+
+ // File should be empty.
+ uint64_t file_size;
+ ASSERT_EQ(env_->GetFileSize(kLogFile, &file_size), Status::OK());
+ ASSERT_EQ(file_size, 0);
+ ASSERT_EQ(logger->GetLogFileSize(), 0);
+ ASSERT_EQ(logger->Close(), Status::OK());
+ }
+ DeleteLogFile();
+}
+
+TEST_F(EnvLoggerTest, Close) {
+ auto logger = CreateLogger();
+
+ // Write multiple lines.
+ const int kNumIter = 10;
+ WriteLogs(logger, kSampleMessage, kNumIter);
+
+ ASSERT_EQ(logger->Close(), Status::OK());
+
+ // Validate whether the log file has 'kNumIter' number of lines.
+ ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage), kNumIter);
+ DeleteLogFile();
+}
+
+TEST_F(EnvLoggerTest, ConcurrentLogging) {
+ auto logger = CreateLogger();
+
+ const int kNumIter = 20;
+ std::function<void()> cb = [&]() {
+ WriteLogs(logger, kSampleMessage, kNumIter);
+ logger->Flush();
+ };
+
+ // Write to the logs from multiple threads.
+ std::vector<port::Thread> threads;
+ const int kNumThreads = 5;
+ // Create threads.
+ for (int ii = 0; ii < kNumThreads; ++ii) {
+ threads.push_back(port::Thread(cb));
+ }
+
+ // Wait for them to complete.
+ for (auto& th : threads) {
+ th.join();
+ }
+
+ ASSERT_EQ(logger->Close(), Status::OK());
+
+ // Verfiy the log file.
+ ASSERT_EQ(test::GetLinesCount(kLogFile, kSampleMessage),
+ kNumIter * kNumThreads);
+ DeleteLogFile();
+}
+
+} // namespace ROCKSDB_NAMESPACE
+
+int main(int argc, char** argv) {
+ ::testing::InitGoogleTest(&argc, argv);
+ return RUN_ALL_TESTS();
+}